Feedforward Rotor Fault Compensation

Autor(es)

Wu, Matheus F. ^[1] ; Cavalca, Katia L. ^{[1, 2]} ; Markert, Richard ^[3]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Mech Engn, Rua Mendeleyev 200, BR-13083860 Campinas, SP - Brazil

^[2] Markert, Richard, Darmstadt Tech Univ, Inst Appl Dynam, Darmstadt, Germany.Wu, Matheus F., Univ Estadual Campinas, Sch Mech Engn, Rua Mendeleyev 200, BR-13083860 Campinas, SP - Brazil

^[3] Darmstadt Tech Univ, Inst Appl Dynam, Darmstadt - Germany

• Tipo de documento: Artigo Científico
• Fonte: STRUCTURAL CONTROL & HEALTH MONITORING; v. 27, n. 6 JUN 2020.
• Citações Web of Science: 1

Resumo

When damaged, it is not unusual to observe nonlinear responses in previously linear structures. Specifically, in rotating machinery context, unbalance, misalignment, bearing, and shaft damage occur during operation, and their responses arise as a combination of multiple modes and harmonics. These vibration effects are undesirable and, besides compromising the system performance, can propagate or generate further faults. In practice, the machine cannot be simply stopped for repairs, and a method for provisory attenuating such problems is desirable. The fault effects can be approximated by a set of loads distributed along the healthy rotor linear model approximation. Intuitively, one can also estimate counteractive forces to mitigate the fault symptoms. Therefore, this work proposes a simple feedforward approach to detect and compensate fault effects at multiple harmonics in rotors. The compensating force is calculated to minimize the least square modal difference between healthy and faulty rotor. A test rig is operated in distinct conditions to demonstrate and validate the method highlighting different fault symptoms (unbalance, misalignment, and shaft bow). (AU)

• Processo FAPESP: 15/20363-6 - Identificação e controle tolerantes a falhas em sistemas rotativos
• Beneficiário: Katia Lucchesi Cavalca Dedini
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 16/13059-1 - Controle com parâmetros linearmente variantes aplicado a máquinas rotativas
• Beneficiário: Matheus Freire Wu
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 17/15494-0 - Controle de vibrações de uma bancada de testes com mancais hidrodinâmicos usando controle gain-schduled
• Beneficiário: Matheus Freire Wu
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto